Riki is a prankster to say the least, he always jokes around, always pranks others and makes fun of people but in fact, he's very handsome and athletic and basically that's why girls turn a blind-eye to his behavior. You're not exactly the total opposite it's just that you cannot really afford to make a lot of effort due to your heart problems because since when you were little, you've been in and out of hospitals, always making sure your heartbeat is stable and you never did too much physical activity not to trigger it.

Everybody knows this already since it's pretty obvious so today during the swimming lecture, as always you were sitting down while the others were training not to exhaust yourself, the teacher is totally understanding so he's even letting you use your phone or talk to your friends so as not to get bored. While they were swimming, you got up to get some water when a guy accidentally bumped into you and made you fall inside the pool as you panicked and your heartbeat skyrocketed as Riki saw the commotion and jumped in to save you without a second thought...